Fuse.



L. & J. SGHULMAN.

FUSE.

APPLICATION FILED AUG-.15, 1908.

Patented May 18, 1909.

INVENTORS I @TTORNEYS WITNESSES:

arses Lot siscn uliN AND FOSlTlH scnutinin, or new YORK, Y., i sslenons to AMERICAN -{ib al1-to7wm it may concern: 7

Be i known that we, LOUIS SGHULMAN, a citizen oftheUmted States of America, and

- a resident'of Brooklyn, county of King's, city and State of New Yprk, and Josnrn Sonny MAN, a citizen of the United States of nmeriba, and a resident of Brooklyn, county of Kings'; -city and-State of, New York, have in'vented certain new and useful Improve;

1Q ments" in Fuses, of which the following is spec fication; reference being had to the jaccom anying drawings, forming a :part thereo'. Y

Our invention relates to an improyed fuse,

'5 suchas is particularly adapted for use in con nection withfire-works, and for blasting, and

f'orsl nilar purposes.

A fuse constructed in accordance with our nvention comprises one or more strips of 29 paper twisted tightly into rope-like form, and

an exp'losive compound containedwithin the sanie and within the folds formed by the :t'wisting. The paper is preferably impreg nated with a solution containing combustible 25.01 explosive elements so that the paper itself becomes a part of the'fuse proper, and is not amere wrapping for the same. The explosive compound employed comprises suchingredientsaswill be but little affected by moisture.

and the paper itself being impregnated will fuse; second, to provide a fuse which shall- -burn with a Visible flame; third, to provide a slow burning fuse; and fourth, to provide a 40 fuse which, while not covered with any water-proof envelop, shall not be materially affected by dampness or moisture.

The drawing herewith illustratcsa fuse constituting the embodiment of our in'ven tion.

The paper element of the fusemay comprise one or more strips, the drawing show ing two such strips, a, I). These strips may conveniently be in the form of tape from onehalf an inch to five-eighths of an inch in width and'of an indefinite length. y In the manufacture of the fuse this tape or these tapes are twisted lengthwise while the explosive compound 0 is fed thereto. The result is that the compound is not only enveloped out. The paper becoming one of the -co1n.-

in icinicunrg MFG. coiirANY, or new roan, n CORPORATION or NEW YORK.

FUSE. I

Specification of Letters Patent.

Patented May 18, lacs.

Application filed August 1'5, 1908. Serial No. 4=s8,65 7.

by the paper, but the said compound is substantially distributed throughout the same, being contained in the twists or convolutions of the paper as it is formed into the finished fuse. I I l One or more cotton threads (Z may be 9111'? ployed centrally along the fuse, if preferred, such cotton threads being useful for the purpose of assisting the feeding of the explosive compound to the paper strips.

Prior to the twisting operation the aper is preferably impregnated with a so ution containing paste, sulfur, and saltpeter. This solution may be prepared by taking the ingredients in the proportion of about one pound of commercial'starch paste and mixing therewith about four ounces of saltpeter. The result of thus treating the paper is, first, to render it pliable so that it may be easily handled and twistedwithout breaking; second, because the twist, once formed, to be vmaintained when the paper is dried; third, the paste element has the effect of cementing the different parts together; and fourth, the saltpeter and sulfur render the paper so readily inflammable that it actually becomes one of the combustible elements of the fuse as a whole.

The explosive compound is composed 'of'a mixture of one of the metallic chlorates, one of the metallic nitrates, sulfur, and carbon; the particular ingredients we have so far employed with good results being potassium chlorate, potassium nitrate, sulfur flour, and

powdered charcoal. Vl e have combined these ingredients with good success in the following iroportions: 38% KClO 26% liN-O 17, S, 19% C. Of course, it will be understood that theseproportions maybe yaried within certain limits. In practice we'have found that Variations may be made within a limit of about ten per cent. without materially affecting the result.

I It will, of course, be understood that other chlorates and nitrates besides potassium chlorate and potassium nitrate may be-employed, and that the carbon element may be introduced in other forms besides in the form of charcoal.

It will. be readily understood that a fuse constructed. inaccordance with. the foregoing will be very cheap, because the ingredients are all inexpensive and in manufacturing may be readily and quickly carried are bustible elements causes the fuse to burn with a visible flame, and this is highly desirable in some work,-particularly in firework fuses. The fuse is a slow burning one 5 moreover'and the speed at which it will burn may be readily regulated by the tightness of the twist,the tighter the twist .in the paper the slower the burning, and the looser the twist, the quicker. found that because of the incorporation of the compound in the twists of thepaper the burning'takes place along a spiral path, and this tends to make a slower burning fuse with regard .to the damp proof qualities.

We have foundin actual ractice that a fuse made in accordance wit 1 the foregoing 1. A fuse composed of one or more strips oftwisted paper, and an explosive compound contained therein, the explosive compound being contained within and betweenthe twisted folds of the strip or strips, thereby forming a substantially spiral' fuse ofrope like-form.

2. Afus'e composed of one or more strips of twisted paper, an explosive comiouncl contained therein, and one or more t reads of cotton as a central bore, the explosive compound being contained w'ithinand between the twisted folds of the strip or strips, thereby forming a substantially spiral fuse 40 of rope like form.

A fuse comprising one or more strips of twisted paper, and an explosive compound contained within and between the twisted folds thereof, the paper of-which the strip or strips are composed having been impregnated with a solution containing explosive elements, and paste.

4. A fuse comprising one-or more strips of twisted paper, and an explosive compound In practice it i is I contained in thejtwisted folds thereof, the paper of which the strip or strips are composed having been impregnated with a solupotassium nitrate, sulfur,

contained therein compnsmg about 38% ofa metallic chlorate, aboutj26 of a metallic carbon.

7. A fuse comprising one or more strips of;

twisted paper, and an explosive, compound contained therein comprising about 38% of potassium chlorate, about 26% of potassium nitrate, 17% sulfur, and about 19% charcoal. I

S. A fuse composed of hue or more strips of twisted paper, and an explosive compound contained therein, the paper, of which the strip or strips are composed having been imregnated with a solution containing comustible elements, and the explosive compound comprising a metallic chlorate, a metallic nitrate, sulfur, and carbon.

9. A fuse comprising one or more strips of twistedpaper, and an explosive compound 'contained in the twisted folds thereof, the

paper of which the strip or strips are composed having been impregnated with a solution containing'potassium nitrate and'sulfur,

and an explosive com ound comprising about 38% potassium-ch orate, about 26%.

potassium .nitrate', about 17% sulfur, and

about 19% charcoal.

LOUIS SCH-ULMANQ. JOSEPH SCHULMAN.

nitrate, about1-7% sulfur, and about-19%- Vv itnesses to signature of Louis Schulman:

D. HOWARD HA WOOD, E. M. H. HAYWOOD.

Witnesses to signature of Joseph Sch ulit man:

D. HOWARD HAYWOOD, LYMAN S. ANDREWS,-Jl. 

